16 September 2014 Wavelet transform-based method of compensating dispersion for high resolution imaging in SDOCT
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Proceedings Volume 9236, Scanning Microscopies 2014; 92360X (2014) https://doi.org/10.1117/12.2065309
Event: SPIE Scanning Microscopies, 2014, Monterey, California, United States
Abstract
The axial resolution is an important parameter in Optical Coherence Tomography (OCT). In OCT a broadband light source is used to achieve high axial resolution imaging. However the dispersion results in a broadening of the coherence envelope. The dispersion mismatch between reference and sample arms then needs to be minimized to achieve optimal axial resolution for OCT. In this work we propose a new numerical dispersion compensation method to obtain ultrahigh resolution in SDOCT, in which wavelet transform instead of Fourier transform is used to obtain the signal in different frequency domain. And a series of the phase signals of different interfaces of the sample can be obtained. Under the homogeneous medium approxiamtion, the phase signal is a linear function of the wave number. Thus based on linearization of the phase signal of different interface and the wave number, the axial resolution can be improved.
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Haiyi Bian, Haiyi Bian, Wanrong Gao, Wanrong Gao, "Wavelet transform-based method of compensating dispersion for high resolution imaging in SDOCT", Proc. SPIE 9236, Scanning Microscopies 2014, 92360X (16 September 2014); doi: 10.1117/12.2065309; https://doi.org/10.1117/12.2065309
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